From cef542a0659e18f50de1e8576fd4fca4d2f76f97 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 22 Jul 2012 17:42:05 +0100
Subject: [PATCH 1/1] light bracket: countersunk holes, better base, etc.

---
 light-bracket.scad | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/light-bracket.scad b/light-bracket.scad
index e83a465..0ec1337 100644
--- a/light-bracket.scad
+++ b/light-bracket.scad
@@ -6,12 +6,14 @@ mainhole_thick=remote_thick+1;
 hook_hook_thick=1.5;
 hook_stem_thick=1.5;
 hook_hook_len=1.5;
-base_thick=6;
-base_margin=4.0;
+base_thick=3.5;
+base_margin=3.0;
 base_width=remote_width-base_margin*2;
 base_height=remote_height-base_margin*2;
 base_edgewidth=4;
 
+screw_ys=[ 28, remote_height-28 ];
+
 // origin is base of mainhole
 
 module mainhole() {
@@ -78,8 +80,6 @@ module base() {
 //		cube(center=false, [base_width,base_height,base_thick+10]);
 }
 
-screw_ys=[ 20, remote_height-30 ];
-
 module stuff() {
 	hstuff();
 	mirror([1,0,0]) hstuff();
@@ -90,9 +90,11 @@ module stuff() {
 
 module screwhole(holedia, csdia) {
 	// screw goes along z axis downwards
-	// origin is base of countersink
+	// origin is top of head
 	// results are positive, so this should be subtracted
 	translate([0,0,-100]) cylinder(h=200, r=holedia/2);
+	csdist=(csdia-holedia)/2;
+	translate([0,0,-csdist]) cylinder(h=csdist, r1=holedia/2, r2=csdia/2);
 	cylinder(h=100, r=csdia/2);
 }
 
@@ -101,8 +103,8 @@ module bracket() {
 	difference() {
 		stuff();
 		mainhole();
-		for (y=screw_ys) translate([0, y, -base_thick+2])	
-			screwhole(5,8); //dia=4 gives 2.9
+		for (y=screw_ys) translate([0, y, 0])	
+			screwhole(5,9); //dia=4 gives 2.9
 					 //holedia=10 gives 9.0 want 7.0
 		translate([0,0,-50 - base_thick])
 			cube(center=true,[300,300,100]); // print bed
-- 
2.30.2